Question

How much current will an electric heater having an internal resistance of 220 ohm draw when connected to 220V power supply?

Answer 1

✬ Current = 1 Ampere ✬

Explanation:

Given:

• Resistance of heater is 220 Ω
• Power supply or voltage is 220V

To Find:

• How much current will pass ?

Formula to be used:

• Ohm's law
• V = IR

Solution: Here, We have

• v = 220v (Voltage)
• I = Current ?
• R = 220Ω ( Resistance )

Putting the values on formula

$\implies{\rm }$ V = IR

$\implies{\rm }$ 220 = I $\times$ 220

$\implies{\rm }$ 220 = 220I

$\implies{\rm }$ 220/220 = I

$\implies{\rm }$ 1 = I

Hence,Heater will draw 1 Ampere of electric current.

___________

• S.I unit of current is Ampere (A)

• S.I unit of charge is Coulomb (C)

• S.I unit of resistance is ohm Ω

• S.I unit of voltage is Volt (V)

• S.I unit of Power is watt (W)

Answer 2

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✬Given:

→ Resistance of heater is 220 Ω

→ Power supply or voltage is 220V

✬To Find:

→ How much current will pass ?

✬Formula to be used:

Ohm's law

V = IR

✬Solution:

Here, We have

→ V = 220v (Voltage)

→ I = Current ?

→ R = 220Ω ( Resistance )

Putting the values on formula

⟹ V = IR

⟹ 220 = I \times× 220

⟹ 220 = 220I

⟹ 220/220 = I

⟹ 1 = I

Hence, Heater will draw 1 Ampere of electric current.

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Hope it helps !!